Vitamin D3 + K2
❤️ Aids heart & circulatory function
🛡️ Contributes to immune defence
💪 High-strength, quality formula
£20.00
In stock
Feel-good promise: 60-day hassle-free returns
Overview
Our high-strength Vitamin D3 + K2 capsules offer targeted daily support for your bones, heart, and immune system. These two essential nutrients work together to help your body absorb and utilise calcium effectively, contributing to overall wellbeing.
Known for their combined power in supporting calcium metabolism, Vitamin D3 aids calcium absorption, while Vitamin K2 helps direct it to where it's needed most, your bones, and away from soft tissues. This makes our D3 + K2 an ideal choice for anyone looking to maintain strong bones, healthy muscle function, and robust immune defences.
According to the UK Gov website, approximately 1 in 6 adults in the UK have vitamin D levels below the recommended amount. Each of our capsules deliver a potent dose of 3000iu (75µg) Vitamin D3 and 100µg Vitamin K2 (as MK-7), providing powerful support in one convenient daily serving.
Who it's for
You feel tired or run-down, especially in autumn and winter
You get little sun (urgh, UK weather!)
You want to avoid vitamin D deficiency as the NHS recommends
You want to keep bones, muscles, and immunity strong
You want superior absorption and quality — not a cheap supermarket tablet
For best results
We recommend you take 1 capsule daily with water and food.
As with any food supplement, consistency is key – take it daily over time to feel the full benefits. For optimal results, incorporate these capsules into a balanced lifestyle including a varied diet and regular physical activity.
Science & evidence
Vitamin D3 plays a crucial role in the absorption of calcium and phosphorus, essential for maintaining normal bones, teeth, and muscle function.
Vitamin K2 (specifically as MK-7) works synergistically with D3 by helping to direct absorbed calcium into the bones, thereby contributing to the maintenance of normal bones. It also contributes to normal blood clotting.
This powerful combination is particularly beneficial for those with limited sun exposure, older adults, or anyone looking for comprehensive support for bone density and cardiovascular health.
Nutritional Information
Per 1 capsule
| Ingredient | Amount | %NRV |
|---|---|---|
| Vitamin D3 | 75µg (3000iu) | 1500% |
| Vitamin K2 | 100µg | 133% |
%NRV = Nutrient Reference Value
High strength Vitamin D for everyday feel-good
Our high-strength Vitamin D3 + K2 capsules deliver a concentrated 3000iu (75µg) of Vitamin D3 and 100µg of Vitamin K2 (as MK-7). This powerful combination is specifically formulated to ensure calcium is absorbed efficiently and directed to your bones, rather than accumulating in soft tissues.
Vitamin D contributes to normal calcium absorption and utilisation, helping to maintain strong bones and healthy muscle function. Vitamin K2 complements this by playing a role in normal blood clotting and ensuring calcium is properly integrated into bone matrix.
Benefits of daily use
Supports bone strength: Vitamin D3 aids calcium absorption while K2 helps direct it to your bones, contributing to the maintenance of normal bones.
Maintains muscle function: Vitamin D3 contributes to normal muscle function, supporting mobility and overall physical wellbeing.
Contributes to a healthy immune system: Vitamin D3 supports immune defences, which is especially important for year-round protection.
Supports normal blood clotting: Vitamin K2 contributes to normal blood clotting, playing an important role in circulatory health.
Works in synergy: D3 and K2 provide more targeted and comprehensive support when taken together than alone for calcium metabolism.
What's inside our Vitamin D3 + K2 supplement?
Vitamin D3
Vitamin K2
Microcrystalline Cellulose
Ingredient list
Bulking Agent: Microcrystalline Cellulose, Capsule Shell: (Hydroxypropyl Methylcellulose), Vitamin D3 Prep (Acacia Gum, Sugar Cane, Sunflower Oil, Starch, Cholecalciferol), Vitamin K2 Prep (Dicalcium Phosphate, Vitamin K as MK7 (soya)), Anti-Caking Agents (Magnesium Stearate, Silicon Dioxide)
What we don’t include
We keep our formulas clean, purposeful, and backed by science. Every ingredient has a clear reason to be there.
That means no unnecessary fillers, artificial additives or empty claims. Every product is made with science-led formulas to deliver evidence-based nutrition you can trust, in forms your body can use.
No trends or gimmicks
Our founder, Liv, is a biomedical scientist. All our formulas are based on the latest research and clinical studies — not fads.
No fillers or additives
Every Supp product only contains ingredients that have a clear role in your health.
No low-quality ingredients
We source premium nutrients in research-backed doses, optimised for absorption.
No artificial colours or flavours
We keep our ingredients natural, so you get clean, effective nutrition.
What is Vitamin D3 + K2?
Vitamin D and Vitamin K are two fat-soluble vitamins that are essential for many bodily functions, particularly when it comes to calcium metabolism and bone health. Our supplement combines these two crucial nutrients, providing them in optimal forms and dosages for maximum benefit.
Vitamin D3 is often referred to as the ‘sunshine vitamin’ as it’s primarily produced in the skin upon exposure to sunlight. It’s vital for the absorption of calcium from the gut, which is then used to build and maintain strong bones. It also plays a significant role in immune system function and muscle health.
Vitamin K2 (Menaquinone-7 or MK-7) is less commonly known but equally important. It acts as a co-factor with Vitamin D3, helping to direct the absorbed calcium to the bones and teeth, and preventing its accumulation in soft tissues like arteries. This synergistic action ensures calcium is utilised effectively where it’s needed, contributing to both bone and cardiovascular health.
This combination is particularly beneficial for those in the UK who may have limited sun exposure, individuals with dietary restrictions, or anyone looking to ensure optimal bone density and overall vitality. Our capsules offer a convenient way to get these vital nutrients daily.
FAQs
Why is it important to take Vitamin D3 and K2 together?
Is this supplement suitable for vegetarians?
When is the best time to take Vitamin D3 + K2?
Can I take this supplement if I'm on medication?
Supp Vitamin D3 + K2 details
Our Vitamin D3 + K2 is a high-strength supplement combining 3000iu (75µg) of Vitamin D3 with 100µg of Vitamin K2 (as MK-7). This synergistic formula supports the maintenance of normal bones, muscle function, and a healthy immune system, while also contributing to normal blood clotting. Each daily serving provides optimal absorption and targeted calcium utilisation in a convenient, vegetarian-friendly capsule.
Cautions:
Always consult your health practitioner before taking nutritional supplements, especially if you are taking medication or are under medical supervision. Not recommended for children, pregnant or lactating women. You should not take supplements as a substitute for a varied balanced diet or healthy lifestyle. Store in a cool dry place, out of reach of children. Suitable for vegetarians but not vegans. Not suitable if you have a soy allergy.
Allergy Advice:
Not suitable for anyone with a soya allergy. Although rigorous precautions are taken to prevent any cross-contamination, this product is manufactured in a facility that handles allergy-based materials.
Delivery & returns
We deliver across the UK with Royal Mail.
Orders are usually dispatched within 1 working day from our UK-based warehouse.
Free delivery on all orders and subscriptions over £30.
We want you to be completely happy with your purchase. With our feel good promise, you can return any unopened products for a full refund up to 60 days later.
Security, payment & privacy
All payments are processed securely using industry-standard encryption.
We accept all major debit and credit cards.
Your details are kept safe and never shared with third parties.
You’re in control of your data at all times.
Quality & safety commitment
All Supp supplements are manufactured in the UK under Good Manufacturing Practice (GMP) standards in BRCGS AA-certified facilities.
Every product is rigorously tested for purity, safety and quality.
We source high-quality, traceable ingredients from trusted suppliers.
Our formulations follow UK and EU regulations for food supplements.
Who are Supp?
We started Supp because health shouldn’t be complicated.
We are a UK-based supplement brand created to make better health simple. We offer well-sourced supplements, clear information and no unnecessary fillers.
With fast delivery, fair pricing and products you can trust, our goal is to help you choose smarter, whether you’re supporting energy, focus, recovery or overall wellbeing.
Vitamin D3 + K2: Scientific Resources & Clinical Studies
UK Vitamin D status and deficiency prevalence
Low vitamin D is common in the UK. The latest National Diet and Nutrition Survey shows that almost 1 in 6 adults are deficient in vitamin D, with their blood vitamin D measuring below 25 nmol/L.
UK recommendations on vitamin D intake
The UK Scientific Advisory Committee on Nutrition advises 10 micrograms per day for those aged 4 and over to protect musculoskeletal health.
NHS guidance on safe vitamin D dosing
NHS guidance states most adults should not exceed 100 micrograms (4,000 IU) per day.
Vitamin K2 (MK-7) supports stronger bones with better absorption than K1
A clinical study compared vitamin K1 with MK-7 (the form of vitamin K2 we use). MK-7 stayed in the body longer, built up to higher levels, and supported more complete activation of osteocalcin – a protein essential for healthy bones. The research also noted that high intakes of MK-7 may interact with blood-thinning medications.
Vitamin K2 and D3 Together Increase Bone Density in Postmenopausal Women
A two-year clinical trial shows that combining vitamin K2 with vitamin D3 increased bone mineral density (BMD) more than either vitamin alone or diet changes. Higher BMD is linked to stronger bones and a lower risk of fractures.
Synergy of vitamins D and K
A peer‑reviewed overview summarises RCTs indicating combined vitamin D and vitamin K may provide complementary benefits for bone outcomes in postmenopausal populations.
Our Articles
Vitamin D3 + K2: Why They Work Better Together for Bone & Heart Health
Food supplements should not be used as a substitute for a varied, balanced diet and healthy lifestyle.
If you are pregnant, breastfeeding, taking medication or have a medical condition, consult your doctor before use.
Quality you can trust.
Every Supp product starts with high-quality, responsibly sourced ingredients and ends with rigorous testing to make sure what’s on the label is exactly what’s in the bottle.
We manufacture to strict GMP (Good Manufacturing Practice) standards right here in the UK, with checks at every stage to ensure purity, safety, and consistency. From raw ingredient testing to final batch verification, we never compromise on quality.
You’ll always find clear, honest labelling with no unnecessary fillers, hidden ingredients, or inflated claims. Just clean, evidence-led nutrition designed to support your health goals.